Posted by marsh_1 on 9/30/2013 5:16:00 PM (view original):Looks like 6 days to me, anything under 172 days on big league regular season roster (<172) and there are 177 regular days in a season.

Minor league assignments of less than 20 days are counted as major league service.

It is 20 minor league days.

My rule of thumb: if your minor league season start on the AM game on Monday, do your call ups the following Monday after the AM game. It may be an extra day or two, but it removes the math from the equation.